ABOUT MY MX 6

1993 Mazda MX6

1993 Mazda MX6 6 cyl Front Wheel Drive Automatic 226000 miles

i have a mazda mx 6 1993 and I was concerned on the engine because everytime a change oil with castrol senthetic still a bit noisy on the engine. That would be normal? And then there is a blink sometimes for ingine check and just a few second then its gone. Is that something going on with the car computer. Thank you